Other Assets (Tables)

12 Months Ended

Dec. 31, 2018

Other Assets [Abstract]

Schedule of Other Assets, Noncurrent [Table Text Block]

	2018		2017
Restricted insurance settlement	$	20,278	$	21,171
Uncertain tax positions		4,861		4,543
Supplemental retirement income program		1,491		1,594
Pension assets		3,656		1,184
Other		1,769		1,557
Total other assets	$	32,055	$	30,049